O Level Elementary Mathematics Graphs Coordinate Geometry Quiz

O-Level Elementary Mathematics Quiz - Graphs Coordinate Geometry

Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: _______ / 40

Duration: 60 minutes
Total Marks: 40

Instructions:

• Answer all 20 questions.
• Show your working clearly where required.
• Use a ruler and graph paper if needed.
• Write your answers in the spaces provided.

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Section A: Coordinate Basics (Questions 1–5)

1. Plot the point $A(3, -2)$ on a Cartesian plane. Write down the quadrant in which $A$ lies. [2]

Answer: ________________________________________________________

2. The coordinates of point $B$ are $(-4, 5)$. State the $x$-coordinate and the $y$-coordinate of $B$. [2]

Answer: ________________________________________________________

3. Find the distance between the points $P(1, 2)$ and $Q(4, 6)$. [2]

Answer: ________________________________________________________

4. Given $R(2, 3)$ and $S(2, -1)$, state whether the line $RS$ is horizontal or vertical. [1]

Answer: ________________________________________________________

5. The midpoint of $M(0, 0)$ and $N(6, 8)$ is $K$. Find the coordinates of $K$. [2]

Answer: ________________________________________________________

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Section B: Lines and Gradients (Questions 6–12)

6. Find the gradient of the line passing through $(1, 1)$ and $(3, 5)$. [2]

Answer: ________________________________________________________

7. A line has equation $y = 2x - 3$. Write down its gradient and $y$-intercept. [2]

Answer: ________________________________________________________

8. Find the equation of the line with gradient $4$ passing through $(0, -2)$. [2]

Answer: ________________________________________________________

9. The line $L$ passes through $(2, 3)$ and is parallel to $y = -x + 1$. Find the equation of $L$. [3]

Answer: ________________________________________________________

10. Determine whether the points $(1, 2)$, $(2, 4)$, and $(3, 6)$ are collinear. Show your reasoning. [3]

Answer: ________________________________________________________

11. A line crosses the $x$-axis at $(5, 0)$ and the $y$-axis at $(0, -2)$. Find its gradient. [2]

Answer: ________________________________________________________

12.

Generated graph for Q12.

Using the graph above, find the gradient of the line shown. [2]

Answer: ________________________________________________________

---

Section C: Graphs of Functions (Questions 13–17)

13. Complete the table of values for $y = x^2 - 1$:

$x$	$-2$	$-1$	$0$	$1$	$2$
$y$

[2]

Answer: ________________________________________________________

14. Sketch the graph of $y = x^2 - 1$ for $-2 \le x \le 2$. Mark the turning point. [3]

Answer: ________________________________________________________

15. The graph of $y = ax^2 + bx + c$ has a minimum at $(1, -4)$. State the value of the $x$-coordinate of the line of symmetry. [1]

Answer: ________________________________________________________

16. For the function $y = \frac{1}{x}$, state the equations of its asymptotes. [2]

Answer: ________________________________________________________

17.

Generated graph for Q17.

From the graph above, write down the equation of the parabola in the form $y = ax^2 + c$. [3]

Answer: ________________________________________________________

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Section D: Application and Interpretation (Questions 18–20)

18. A taxi company charges a flat fee of $3 plus $2 per km. Plot the graph of cost $C$ against distance $d$ (in km) for $d = 0, 1, 2, 3$. Write the equation linking $C$ and $d$. [4]

Answer: ________________________________________________________

19. Using the graph from Q18, find the cost of a 2.5 km trip. [2]

Answer: ________________________________________________________

20. Two lines are given: $y = 3x + 1$ and $y = -x + 5$. Find the coordinates of their point of intersection. [3]

Answer: ________________________________________________________ </stage3_quiz_answers_md>

<stage3_quiz_answers_md>

O-Level Elementary Mathematics Quiz - Graphs Coordinate Geometry (Answer Key)

Total Marks: 40
Topic: Graphs Coordinate Geometry

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Section A: Coordinate Basics

1. [2 marks]
Point $A(3, -2)$: $x = 3$ (positive), $y = -2$ (negative).
Quadrants: Q1 (+,+), Q2 (−,+), Q3 (−,−), Q4 (+,-).
Thus $A$ lies in Quadrant 4.
Teaching note: Cartesian plane divided into 4 quadrants by axes. Positive x right, negative x left; positive y up, negative y down.
Common mistake: Confusing sign order or naming Q4 as Q3.

2. [2 marks]
$B(-4, 5)$: $x$-coordinate = -4, $y$-coordinate = 5.
Teaching note: Ordered pair $(x, y)$; first value is horizontal position, second is vertical.

3. [2 marks]
Distance formula: $d = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}$
$= \sqrt{(4-1)^2 + (6-2)^2} = \sqrt{3^2 + 4^2} = \sqrt{9+16} = \sqrt{25} = 5$
Answer: 5 units.
Marking: 1 mark formula/substitution, 1 mark final answer.

4. [1 mark]
$R(2,3)$ and $S(2,-1)$ have same $x$-coordinate → line is vertical.
Teaching note: Same x = vertical line; same y = horizontal line.

5. [2 marks]
Midpoint $K = \left(\frac{0+6}{2}, \frac{0+8}{2}\right) = (3, 4)$.
Answer: (3, 4).
Teaching note: Midpoint averages the coordinates.

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Section B: Lines and Gradients

6. [2 marks]
Gradient $m = \frac{y_2-y_1}{x_2-x_1} = \frac{5-1}{3-1} = \frac{4}{2} = 2$.
Answer: 2.

7. [2 marks]
Equation $y = mx + c$: $m = 2$, $c = -3$.
Gradient = 2, y-intercept = -3.
Teaching note: In $y = mx + c$, $m$ is gradient, $c$ is y-intercept.

8. [2 marks]
$m = 4$, through $(0, -2)$ → y-intercept $c = -2$.
Equation: $y = 4x - 2$.
Answer: $y = 4x - 2$.

9. [3 marks]
Parallel to $y = -x + 1$ → same gradient $m = -1$.
Through $(2,3)$: $3 = -1(2) + c \Rightarrow c = 5$.
Equation: $y = -x + 5$.
Marking: 1 mark gradient, 2 marks equation.

10. [3 marks]
Gradients: $(1,2)$ to $(2,4)$: $\frac{4-2}{2-1}=2$; $(2,4)$ to $(3,6)$: $\frac{6-4}{3-2}=2$.
Same gradient → collinear.
Answer: Yes, collinear (same gradient 2).
Marking: 2 marks for gradients, 1 mark conclusion.

11. [2 marks]
Gradient = $\frac{0 - (-2)}{5 - 0} = \frac{2}{5}$.
Answer: $\frac{2}{5}$.

12. [2 marks]
From graph: A(-1,1), B(2,-2).
$m = \frac{-2-1}{2-(-1)} = \frac{-3}{3} = -1$.
Answer: -1.
Visual needed: line through A and B as described.

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Section C: Graphs of Functions

13. [2 marks]
$y = x^2 - 1$:
$x=-2$: $4-1=3$; $x=-1$: $1-1=0$; $x=0$: $-1$; $x=1$: $0$; $x=2$: $3$.
Table: 3, 0, -1, 0, 3.
Marking: 1 mark partial, 1 mark full.

14. [3 marks]
Sketch: parabola u-shape, vertex (0,-1), points (-2,3),(-1,0),(0,-1),(1,0),(2,3).
Turning point: (0, -1).
Marking: 2 marks shape/points, 1 mark turning point.

15. [1 mark]
Line of symmetry through vertex x-value: $x = 1$.

16. [2 marks]
$y = \frac{1}{x}$: vertical asymptote $x = 0$, horizontal asymptote $y = 0$.
Answer: $x=0$ and $y=0$.

17. [3 marks]
Vertex (0,-3) → $c = -3$. Through (2,0): $0 = a(4) - 3 \Rightarrow a = \frac{3}{4}$.
Equation: $y = \frac{3}{4}x^2 - 3$.
Marking: 1 mark c, 2 marks a and equation.

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Section D: Application and Interpretation

18. [4 marks]
$C = 3 + 2d$.
Table: d=0→3, d=1→5, d=2→7, d=3→9.
Plot points (0,3),(1,5),(2,7),(3,9).
Equation: $C = 2d + 3$.
Marking: 2 marks table/plot, 2 marks equation.

19. [2 marks]
$d=2.5$: $C = 2(2.5)+3 = 8$.
Answer: $8.

20. [3 marks]
$3x+1 = -x+5 \Rightarrow 4x = 4 \Rightarrow x=1$.
$y = 3(1)+1 = 4$.
Intersection: (1, 4).
Marking: 1 mark x, 1 mark y, 1 mark coordinate. </stage3_quiz_answers_md>

<stage3_quiz_md>

O-Level Elementary Mathematics Quiz - Graphs Coordinate Geometry

Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: _______ / 40

Duration: 60 minutes
Total Marks: 40

Instructions:

• Answer all 20 questions.
• Show your working clearly where required.
• Use a ruler and graph paper if needed.
• Write your answers in the spaces provided.

---

Section A: Coordinate Basics (Questions 1–5)

1. Plot the point $A(3, -2)$ on a Cartesian plane. Write down the quadrant in which $A$ lies. [2]

Answer: ________________________________________________________

2. The coordinates of point $B$ are $(-4, 5)$. State the $x$-coordinate and the $y$-coordinate of $B$. [2]

Answer: ________________________________________________________

3. Find the distance between the points $P(1, 2)$ and $Q(4, 6)$. [2]

Answer: ________________________________________________________

4. Given $R(2, 3)$ and $S(2, -1)$, state whether the line $RS$ is horizontal or vertical. [1]

Answer: ________________________________________________________

5. The midpoint of $M(0, 0)$ and $N(6, 8)$ is $K$. Find the coordinates of $K$. [2]

Answer: ________________________________________________________

---

Section B: Lines and Gradients (Questions 6–12)

6. Find the gradient of the line passing through $(1, 1)$ and $(3, 5)$. [2]

Answer: ________________________________________________________

7. A line has equation $y = 2x - 3$. Write down its gradient and $y$-intercept. [2]

Answer: ________________________________________________________

8. Find the equation of the line with gradient $4$ passing through $(0, -2)$. [2]

Answer: ________________________________________________________

9. The line $L$ passes through $(2, 3)$ and is parallel to $y = -x + 1$. Find the equation of $L$. [3]

Answer: ________________________________________________________

10. Determine whether the points $(1, 2)$, $(2, 4)$, and $(3, 6)$ are collinear. Show your reasoning. [3]

Answer: ________________________________________________________

11. A line crosses the $x$-axis at $(5, 0)$ and the $y$-axis at $(0, -2)$. Find its gradient. [2]

Answer: ________________________________________________________

12.

Generated graph for Q12.

Using the graph above, find the gradient of the line shown. [2]

Answer: ________________________________________________________

---

Section C: Graphs of Functions (Questions 13–17)

13. Complete the table of values for $y = x^2 - 1$:

$x$	$-2$	$-1$	$0$	$1$	$2$
$y$

[2]

Answer: ________________________________________________________

14. Sketch the graph of $y = x^2 - 1$ for $-2 \le x \le 2$. Mark the turning point. [3]

Answer: ________________________________________________________

15. The graph of $y = ax^2 + bx + c$ has a minimum at $(1, -4)$. State the value of the $x$-coordinate of the line of symmetry. [1]

Answer: ________________________________________________________

16. For the function $y = \frac{1}{x}$, state the equations of its asymptotes. [2]

Answer: ________________________________________________________

17.

Generated graph for Q17.

From the graph above, write down the equation of the parabola in the form $y = ax^2 + c$. [3]

Answer: ________________________________________________________

---

Section D: Application and Interpretation (Questions 18–20)

18. A taxi company charges a flat fee of $3 plus $2 per km. Plot the graph of cost $C$ against distance $d$ (in km) for $d = 0, 1, 2, 3$. Write the equation linking $C$ and $d$. [4]

Answer: ________________________________________________________

19. Using the graph from Q18, find the cost of a 2.5 km trip. [2]

Answer: ________________________________________________________

20. Two lines are given: $y = 3x + 1$ and $y = -x + 5$. Find the coordinates of their point of intersection. [3]

Answer: ________________________________________________________